Recently a few more LFUV ratios have been measured by the LHCb collaboration. These are in \(B^0 \rightarrow K_S \mu ^+ \mu ^-\)  and \(B^+ \rightarrow K^{*+} \mu ^+ \mu ^-\)  decay modes [1]}. The measured values of the ratios \(R_{K_S} \equiv \Gamma (B^0 \rightarrow K_S \mu ^+ \mu ^-)/\Gamma (B^0 \rightarrow K_S e^+ e^-)\)  and \(R_{K^{*+}} \equiv \Gamma (B^+ \rightarrow K^{*+} \mu ^+ \mu ^-)/\Gamma (B^+ \rightarrow K^{*+} e^+ e^-)\)  have relatively large errors as compared to \(R_K\)  and \(R_{K^*}\)  and are consistent with their SM predictions below 2\(\sigma \)  level. However, like \(R_{K^{(*)}}\) , their central values are lower than the SM predictions. Apart from these ratios, the LFUV new physics can also be captured by constructing additional LFUV observables by taking difference of optimized observables in the muon and electron sector, \(Q_{P_i^{(^{\prime })}}^{\mu e}=P_i^{(^{\prime })\mu }-P_i^{(^{\prime })e}\)  [2]}. The \(Q_{P^{\prime }_4}^{\mu e}\)  and \(Q_{P^{\prime }_5}^{\mu e}\)  observables have been measured by the Belle collaboration [3]}. However, due to large errors, the measured values are consistent with the SM prediction of \(\approx 0\) .
